I'm not against geo-engineering as a general concept, even though I don't personally buy into the most alarmist of the climate change scenarios. If we do do so

I'm not against geo-engineering as a general concept, even though I don't personally buy into the most alarmist of the climate change scenarios. If we do do some kind of project like this, I would want to have a counter in place in case it does more harm than good, as a general rule of thumb. I would want that factored into the cost and preparations in place for just such an eventuality before committing to such a course. In this case, though, it seems relatively trivial - it seems like it's more work to keep them in place then to have them scatter to the (solar?) winds. Once they've moved out of the Lagrange point, then they become a non-issue. All we've lost is the money to put them there and the materials. Compared to some of the other ideas I've heard, this appears to be much safer.